Harmonics from Transformer Saturation

Dommel, H.W.; Yan, Andrew; Shi, Wei

doi:10.1109/tpwrd.1986.4307952

Cited by 88 publications

(18 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is achieved by direct integration of the state variables using any integration method until the initial transient dies-out. However, this Brute Force approach [11] is only recommended for the solution of small systems with, in addition, sufficient damping [12]. Newton methods have been proposed to avoid the computation of the complete transient [13][14].…”

Section: Fast Periodic Steady State Solutionmentioning

confidence: 99%

Synchronous machine stability analysis using an efficient time domain methodology: unbalanced operation analysis

Rodriguez

Medína²

IEEE Power Engineering Society Summer Meeting,

View full text Add to dashboard Cite

This paper describes a methodology for the efficient stability analysis of the synchronous machine. The state space phase coordinates model of the synchronous machine incorporates the effects of time-varying and inter-spatial harmonic inductances. The dynamics of the synchronous machine are represented by a set of Ordinary Differential Equations (ODEs). The machine behaviour is analyzed under severe unbalanced operation conditions. The level of detail and accuracy obtained with the machine model in phase coordinates can not be achieved with conventional models based on the dq0 framework for unbalanced fault analysis. A Newton technique based on a Numerical Differentiation process is used for the acceleration of the convergence of the state variables to the Limit Cycle to obtain the machine initial conditions and the steady state previous to the fault application and after the fault is removed. The combined response obtained with methodology for swift time domain transient and periodic steady state analysis and the phase domain synchronous machine model is compared in terms of accuracy and computational efficiency against a widely used and accepted machine model of an Electro-Magnetic Transient Program (EMTP-ATP).

show abstract

Section: Fast Periodic Steady State Solutionmentioning

confidence: 99%

Synchronous machine stability analysis using an efficient time domain methodology: unbalanced operation analysis

Rodriguez

Medína²

IEEE Power Engineering Society Summer Meeting,

View full text Add to dashboard Cite

show abstract

“…Current harmonics are caused by non-linear loads [6]. When a non-linear load, such as a rectifier, is connected to the system, it draws a current that is not necessarily sinusoidal.…”

Section: Nonlinear Loads In Power Systemsmentioning

confidence: 99%

Analysis for Industrial Grid Containing Nonlinear Loads

Kadhimi

2018

ejuow

View full text Add to dashboard Cite

Harmonics is the most important issue among all issues related to the power quality. Harmonics comes from different non-linear loads like uninterruptible power supplies systems (UPS), variable speed motor drives, rectifiers, personal computers, adjustable speed drives, fluorescent lighting, rectifier banks, data processing loads, arc furnaces, and so on. Simulation of a real power supply system that consists of linear loads and nonlinear loads as variable speed drives has been carried out in the work. Variable speed drives generate harmonics into supply system that contains different values of compensated capacitors. Calculations of equivalent system reactance for generated harmonics, voltage harmonics, voltage harmonics in percentage, THD (Total Harmonic Distortion) of voltage, frequency characteristics, current flows in the system capacitor units have been worked out using Mathcad software. The obtained results have been compared with the European Standard (EN 50160) for supply quality requirements of the European Union.

show abstract

“…To ensure convergence, numerical diagonal dominance of the matrix of system parameters is required. However, this is not a satisfied condition by weak or poorly damped systems or near sharply tuned resonant frequencies [15], [16]. A double-iterative method has been proposed in [17] to improve the convergence characteristics of the IHA.…”

Section: ) Iterative Harmonic Analysis (Iha)mentioning

confidence: 99%

“…This brute force (BF) procedure [58] may require integration over considerable periods of time. It has been suggested only for cases where the periodic response can be obtained in a few cycles [16], such as sufficiently damped systems. The general description of nonlinear and time-varying elements is (16) where x is the state vector of elements.…”

Section: ) Conventional (Brute Force) Solutionmentioning

confidence: 99%

Harmonic Analysis in Frequency and Time Domain

Medína

Segundo

Ribeiro

et al. 2013

IEEE Trans. Power Delivery

107

View full text Add to dashboard Cite

This paper presents a review with a concise description and analysis of the fundamentals, characteristics, analytical details, merits, and drawbacks associated with existing methods in frequency and time domain for harmonic analysis in practical power networks. The description and analysis are centered on methods developed in the harmonic domain, hybrid frequency-time domain, and time domain, respectively. Validation of the reviewed methods for harmonic analysis, against one of the widely accepted digital simulators, such as EMTP, EMTDC, or MATLAB/SIMULINK, is reported in the cited individual contributions.

show abstract

Harmonics from Transformer Saturation

Cited by 88 publications

References 2 publications

Synchronous machine stability analysis using an efficient time domain methodology: unbalanced operation analysis

Synchronous machine stability analysis using an efficient time domain methodology: unbalanced operation analysis

Analysis for Industrial Grid Containing Nonlinear Loads

Harmonic Analysis in Frequency and Time Domain

Contact Info

Product

Resources

About